Do you have regrets because of contacts you’ve deleted? You can restore them as long as they’ve been removed within the last six months.
Go to id.qq.com and enter your QQ ID and password if you are not signed in on QQ or if you are on QQ already, just click the “Quick Sign-in” button.
From there, go to the second tab on the navigation and then select the last one on the side bar menu. You will see a list of contacts you deleted in the past 6 months. You can add any one of them back by clicking on the “+” on the right, which will bring up the friend request window shown below.